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Question Ionization Chamber drifting 

Forum: Event and Track Management
Date: 24 Feb, 2012
From: tbjc1magic <tbjc1magic>

Hi all,

 I am simulating  what happens when a ion travels through a ionization chamber which has magnetic field in it. 

 As you may know, when ions ionize gas particles, they produce electrons and positive ions. When we apply electric field to the chamber, the field separates the secondary pairs and the electric nodes collect how much charge is produce during this process. The process that secondary particles moves toward electric nodes is called drifting.

 However, secondary particles produced from ionization have very low energy and the stopping power for them is so strong. Before they reach the electric nodes, we will be killed by Geant4 for losing too much energy. I tried to lower threshold of electron production, but it has no effect on when will particle be killed. And it simply seems geant4 doesn't bring in drifting. Is there anything to avoid my secondary particle being killed for low energy? And Is there any method to bring in drifting?

Thanks in advance,

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1 Feedback: Re: Ionization Chamber drifting   (Gumplinger Peter - 24 Feb, 2012)
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